Final answer:
The statement is true as adaptations are heritable traits that enhance an organism's survival and reproduction, becoming more common in a population through the process of natural selection.
Step-by-step explanation:
The statement is true. In biology, an adaptation refers to a heritable trait that enhances an organism's ability to survive and reproduce in a particular environment. Over generations, natural selection favors these useful variations, leading to the traits becoming more common within the population. For example, webbed feet in aquatic animals improve swimming capabilities, the distinct beak shapes of finches allow them to consume different types of food, and the cheetah's high speed aids in capturing prey. This process over time ensures that the population's genetic makeup is well-suited to the environment, even as the environment changes, leading to the ongoing evolution of species.
Therefore, variations that help organisms survive and become adaptations over many generations is a key concept in understanding how species evolve through natural selection. The ultimate result is a population that is more 'fit' within its environment, and such adaptations can be anything from physical traits to behavioral patterns that confer an advantage in survival and reproduction.